Not consulting before scheduling
You’re both busy adults. It can be very difficult to hop on the phone every time one of you is invited on a trip or a to a dinner or to a concert. Inevitably, you’ll wind up RSVPing “Yes” for the both of you to something your partner didn’t agree with, or he’ll do this to you. Or you’ll make plans on a night you didn’t realize your partner had something else planned for the two of you. Getting in a fight every time these little miscommunications happen is setting yourself up for a lifetime of arguing.